Weather on September 29 at Indiana Dunes
Indiana Dunes National Park
Based on 55 years of data from Gary, IN
Planning Your Visit
September 29th in Indiana Dunes National Park (via Gary, IN) typically brings pleasant fall weather, with average highs around 70°F and lows near 49°F. Over 55 years of records, the warmest September 29th was in 1971 (77°F average), while the coldest was 1993 (47°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 36% of September 29th dates historically, with the wettest September 29th recording 3.38" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 29th in Indiana Dunes? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 79°F | 57°F | 0" | 0" |
| 2024 | 70°F | 65°F | -- | 0" |
| 2023 | 67°F | 56°F | 0" | 0" |
| 2022 | 58°F | 39°F | 0" | 0" |
| 2021 | -- | 55°F | 0" | 0" |
| 2020 | 61°F | 43°F | 0.38" | 0" |
| 2019 | 70°F | 61°F | -- | -- |
| 2018 | 62°F | 42°F | -- | -- |
| 2017 | 68°F | 51°F | 0.03" | 0" |
| 2016 | 61°F | 56°F | 0.76" | 0" |
| 2015 | 78°F | 65°F | 0.1" | 0" |
| 2014 | 73°F | 50°F | 0" | 0" |
| 2013 | 82°F | 56°F | 0.64" | 0" |
| 2012 | 65°F | 44°F | 0" | 0" |
| 2011 | 62°F | 50°F | 0.1" | 0" |
| 2010 | 65°F | 45°F | 0" | 0" |
| 2009 | 61°F | 50°F | 0" | 0" |
| 2008 | 69°F | 56°F | 0" | 0" |
| 2007 | 69°F | 50°F | 0" | 0" |
| 2006 | 59°F | 40°F | 0.43" | 0" |
| 2005 | 75°F | 50°F | 2.01" | 0" |
| 2004 | 70°F | 47°F | 0.03" | 0" |
| 2003 | 56°F | 48°F | 0.25" | 0" |
| 2002 | 78°F | 58°F | 0.58" | 0" |
| 2001 | 55°F | 47°F | 0" | 0" |
| 2000 | 60°F | 45°F | 0" | 0" |
| 1999 | 70°F | 39°F | 3.05" | 0" |
| 1998 | 78°F | 50°F | -- | 0" |
| 1997 | 77°F | 52°F | 0" | 0" |
| 1996 | 70°F | 48°F | 0" | 0" |
| 1995 | 81°F | 53°F | -- | 0" |
| 1994 | 63°F | 42°F | 0" | 0" |
| 1993 | 55°F | 39°F | 0.13" | 0" |
| 1992 | 61°F | 36°F | 0" | 0" |
| 1991 | 69°F | 32°F | 0" | 0" |
| 1990 | 64°F | 57°F | 0.08" | 0" |
| 1989 | 74°F | 48°F | 0" | 0" |
| 1988 | 80°F | 56°F | 0" | 0" |
| 1987 | 75°F | 58°F | 0.76" | 0" |
| 1986 | 84°F | 57°F | 2.64" | 0" |
| 1985 | 76°F | 47°F | 0" | 0" |
| 1984 | 55°F | 44°F | 0" | 0" |
| 1983 | 82°F | 49°F | 0" | 0" |
| 1982 | 82°F | 52°F | 0" | 0" |
| 1981 | 63°F | 43°F | 1.83" | 0" |
| 1980 | 80°F | 38°F | 0" | 0" |
| 1979 | 82°F | 55°F | 0" | 0" |
| 1978 | 75°F | 41°F | 0" | 0" |
| 1977 | 71°F | 45°F | 0" | 0" |
| 1976 | 69°F | 41°F | 0" | 0" |
| 1975 | 73°F | 44°F | 0.25" | 0" |
| 1974 | 61°F | 45°F | 0" | 0" |
| 1973 | 80°F | 60°F | 0.86" | 0" |
| 1972 | 73°F | 52°F | 3.38" | 0" |
| 1971 | 87°F | 66°F | 0" | 0" |